file(file): handle remote file size check error in download_file resource (#1940)

Signed-off-by: Pavel Boldyrev <627562+bpg@users.noreply.github.com>

fwprovider/nodes/resource_download_file.go

@@ -26,6 +26,7 @@ import (
 	"github.com/hashicorp/terraform-plugin-framework/resource/schema/stringplanmodifier"
 	"github.com/hashicorp/terraform-plugin-framework/schema/validator"
 	"github.com/hashicorp/terraform-plugin-framework/types"
+	"github.com/hashicorp/terraform-plugin-log/tflog"
 
 	"github.com/bpg/terraform-provider-proxmox/fwprovider/attribute"
 	"github.com/bpg/terraform-provider-proxmox/fwprovider/config"
@@ -119,17 +120,29 @@ func (r sizeRequiresReplaceModifier) PlanModifyInt64(
 		}
 
 		if state.Size.ValueInt64() != urlSize {
-			resp.RequiresReplace = true
-			resp.PlanValue = types.Int64Value(urlSize)
+			if urlSize < 0 {
+				resp.Diagnostics.AddWarning(
+					"Could not read the file metadata from URL.",
+					fmt.Sprintf(
+						"The remote file at URL %q most likely doesn’t exist or can’t be accessed.\n"+
+							"To skip the remote file check, set `overwrite` to `false`.",
+						plan.URL.ValueString(),
+					),
+				)
+			} else {
+				resp.RequiresReplace = true
+				resp.PlanValue = types.Int64Value(urlSize)
 
-			resp.Diagnostics.AddWarning(
-				"The file size from url has changed.",
-				fmt.Sprintf(
-					"Size from url %d does not match size from datastore: %d",
-					urlSize,
-					state.Size.ValueInt64(),
-				),
-			)
+				resp.Diagnostics.AddWarning(
+					"The file size from url has changed.",
+					fmt.Sprintf(
+						"Size %d from url %q does not match size from datastore: %d",
+						urlSize,
+						plan.URL.ValueString(),
+						state.Size.ValueInt64(),
+					),
+				)
+			}
 
 			return
 		}
@@ -548,15 +561,13 @@ func (r *downloadFileResource) Read(
 			&state,
 		)
 		if err != nil {
-			resp.Diagnostics.AddError(
-				"Could not get file metadata from url.",
-				err.Error(),
-			)
-
-			return
-		}
-
-		if urlMetadata.Size != nil {
+			tflog.Error(ctx, "Could not get file metadata from url", map[string]interface{}{
+				"error": err,
+				"url":   state.URL.ValueString(),
+			})
+			// force size to -1, which is a special value used in sizeRequiresReplaceModifier
+			resp.Private.SetKey(ctx, "url_size", []byte("-1"))
+		} else if urlMetadata.Size != nil {
 			setValue := []byte(strconv.FormatInt(*urlMetadata.Size, 10))
 			resp.Private.SetKey(ctx, "url_size", setValue)
 		}

fwprovider/nodes/resource_download_file_test.go

@@ -28,6 +28,7 @@ import (
 	"github.com/bpg/terraform-provider-proxmox/proxmox/helpers/ptr"
 	"github.com/bpg/terraform-provider-proxmox/proxmox/nodes/storage"
 	"github.com/bpg/terraform-provider-proxmox/proxmox/ssh"
+	"github.com/bpg/terraform-provider-proxmox/proxmox/types"
 	"github.com/bpg/terraform-provider-proxmox/utils"
 )
 
@@ -163,6 +164,7 @@ func TestAccResourceDownloadFile(t *testing.T) {
 					Node:     ptr.Ptr(te.NodeName),
 					Storage:  ptr.Ptr(te.DatastoreID),
 					URL:      ptr.Ptr(fakeFileISO),
+					Verify:   ptr.Ptr(types.CustomBool(false)),
 				})
 				require.NoError(t, err)
 

fwprovider/test/resource_file_test.go

@@ -42,9 +42,9 @@ func TestAccResourceFile(t *testing.T) {
 
 	snippetRaw := fmt.Sprintf("snippet-raw-%s.txt", gofakeit.Word())
 	snippetURL := "https://raw.githubusercontent.com/yaml/yaml-test-suite/main/src/229Q.yaml"
-	snippetFile1 := strings.ReplaceAll(createFile(t, "snippet-file-1-*.yaml", "test snippet 1 - file").Name(), `\`, `/`)
-	snippetFile2 := strings.ReplaceAll(createFile(t, "snippet-file-2-*.yaml", "test snippet 2 - file").Name(), `\`, `/`)
-	fileISO := strings.ReplaceAll(createFile(t, "file-*.iso", "pretend it is an ISO").Name(), `\`, `/`)
+	snippetFile1 := strings.ReplaceAll(CreateTempFile(t, "snippet-file-1-*.yaml", "test snippet 1 - file").Name(), `\`, `/`)
+	snippetFile2 := strings.ReplaceAll(CreateTempFile(t, "snippet-file-2-*.yaml", "test snippet 2 - file").Name(), `\`, `/`)
+	fileISO := strings.ReplaceAll(CreateTempFile(t, "file-*.iso", "pretend this is an ISO").Name(), `\`, `/`)
 
 	te.AddTemplateVars(map[string]interface{}{
 		"SnippetRaw":   snippetRaw,
@@ -264,26 +264,6 @@ func uploadSnippetFile(t *testing.T, fileName string) {
 	require.NoError(t, err)
 }
 
-func createFile(t *testing.T, namePattern string, content string) *os.File {
-	t.Helper()
-
-	f, err := os.CreateTemp("", namePattern)
-	require.NoError(t, err)
-
-	_, err = f.WriteString(content)
-	require.NoError(t, err)
-
-	defer func(f *os.File) {
-		_ = f.Close()
-	}(f)
-
-	t.Cleanup(func() {
-		_ = os.Remove(f.Name())
-	})
-
-	return f
-}
-
 func deleteSnippet(te *Environment, fname string) {
 	te.t.Helper()
 

fwprovider/test/test_support.go

@@ -8,10 +8,13 @@ package test
 
 import (
 	"fmt"
+	"os"
 	"regexp"
+	"testing"
 
 	"github.com/hashicorp/terraform-plugin-testing/helper/resource"
 	"github.com/hashicorp/terraform-plugin-testing/terraform"
+	"github.com/stretchr/testify/require"
 )
 
 // ResourceAttributes is a helper function to test resource attributes.
@@ -69,3 +72,23 @@ func ResourceAttributesSet(res string, attrs []string) resource.TestCheckFunc {
 		return nil
 	}
 }
+
+func CreateTempFile(t *testing.T, namePattern string, content string) *os.File {
+	t.Helper()
+
+	f, err := os.CreateTemp(t.TempDir(), namePattern)
+	require.NoError(t, err)
+
+	_, err = f.WriteString(content)
+	require.NoError(t, err)
+
+	defer func(f *os.File) {
+		_ = f.Close()
+	}(f)
+
+	t.Cleanup(func() {
+		_ = os.Remove(f.Name())
+	})
+
+	return f
+}